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As the replication pattern of leukemogenic PTLVs possesses a strong pathogenic impact, we investigated HTLV-2 replication in vivo in asymptomatic carriers belonging into 2 distinct populations infected by the same HTLV-2b subtype. They include epidemically infected American blood donors, in whom HTLV-2b has been present for only 30 years, and endemically infected Bakola Pygmies from Cameroon, characterized...
Murine gammaherpesvirus 68 (γHV68, MHV-68)-specific CD4 T cells control γHV68 infection by reducing the frequency of latently infected cells and by inhibiting viral replication. We have previously demonstrated that CD4 T cells do not require CD8 T or B cells to control γHV68 replication, demonstrating a helper-independent activity of CD4 T cells during γHV68 infection. The effector mechanism(s) required...
Human T-lymphotropic virus type II (HTLV-II) prevalence is very low among the general U.S. population, intermediate among American Indians, and high among injecting drug users and their sexual partners. However, the transmission dynamics underlying this distribution are not well described. We obtained blood specimens from 493 blood donors found to be seropositive for HTLV-II at blood centers in five...
Molecular subtyping was used to investigate the epidemiology of human T-lymphotropic virus type II (HTLV-II) in the United States. Nested polymerase chain reaction of the HTLV-II long terminal repeat region followed by restriction fragment length polymorphism (RFLP) analysis was performed on HTLV-II seropositive subjects including 97 U.S. blood donors without major risk factors for HTLV-II infection,...
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